The ultimate approach in getting 100UMS in every math/fm module?

You can do every paper on earth and still not guarantee 100 UMS in an exam situation.

You can do every paper on earth and still not guarantee 100 UMS in an exam situation. The best you can do is make sure that you have a good understanding of the syllabus as well as doing most, if not all questions in the books, in addition to doing plenty of papers. The final element necessary to get 100 UMS is luck.

I think what you're attempting to do is excessive. If you actually manage to finish all the Edexcel papers for the current syllabus (since 2004), and the solomon papers, it may be worth looking at a few papers from other exam boards, but there is definitely no need to do all of those papers as well.

Additionally, doing FSMQ, AQA Level 2 FM, etc, alongside A-Level Maths is redundant as you'd just be covering the same content; it's the same with gold papers - they include questions from past years that people found hard, but if you're going to do all the Edexcel questions anyway, you'll just be repeating questions that you've already done.

Yes, the ugly truth is that the examiners are not perfect (even after requesting a re-mark), and more importantly the marking schemes are not perfectly unambiguous. A-levels are not pure multiple choice, so even in Mathematics a perfect score is impossible to guarantee even with perfect, deep understanding of the material.

You *do* need to get above 90 (at least, almost always) if you want to be perceived as "excellent", for example by Oxbridge. Sad, but true. I think that's a reflection of the completely wrong direction A-levels have gone in over the last 20 years, but ... off topic

Agree with previous poster, you are going overboard with all the different papers. Be more focused, and find teachers who can really review the fine detail of your own syllabus with you.

Understand - if you understand the material you do not need any of your long list

It sounds as though you do not understand but you think that doing enough questions will mean that you get a question that is the same as one you have done

No MEI love?

As above, whilst your dedication is admirable, that's way overboard. Understand the content, learn how to make sure all your working out is written in such a way that you hit max marks, and practise a lot (although maybe not as much as you have listed)

If there is time, I would consider myself to be doing more than the norm but again trying to balance it all.

Thank you I am working on my layout, how would you recommend I improve my understanding

If you look at your textbook, (this is a maybe for you, I can only speak for MEI), it generally has a proof of how you get to a specific formula/technique. It can make things easier to remember (like if you told the average person to simply remember that tanx=sinx/cosx, they'll have a harder time than if you explained how you get to tanx=sinx/cosx). I personally didn't get 100UMS, nowhere near, but that kind of background understanding pulled me up from D grades to B grades.